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Old 04-24-2010, 02:35 PM   #1
bigarmzz
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ls1 motor mount adapter plates

i'm trying to sloooowly gather up the parts needed to do the swap (someday), so far i have the larger radiator installed, better set of rear gears installed (3:42 posi), and have bought a 91 burb gauge cluster

just wandering if these mounts work? these are the thicker one's

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT

these are the thinner ones:
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT

i was up late a few nights ago ready through all the builds, and someone recommended these, but i'm too lazy to look through all those threads again

is there any other parts, that you guys have done this already, would recommend stockin up on so i can have everything to do this?

thanks
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Last edited by bigarmzz; 04-24-2010 at 02:40 PM.
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Old 04-24-2010, 03:12 PM   #2
team39763
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Re: ls1 motor mount adapter plates

Those mounts will work fine if you're planning to run the 700r4 or 4l60e trans. I ran the th350 with those style of mounts and it moved the motor too far from the trans. I ended up bying the S&P 1" setback adapters for mine. The S&P's made the motor sit up higher and gave me a little more exhaust clearance around the frame and control arm.
Start reading up on how you want to do you accessories if you don't already have them, I think which type you use affects if you can fit A/C equipment easily or not. Alternator wiring needs attention - you may have to run a resistor in the wire going to the plug. If you're gonna use a Th350/400, you may have to change the flexplate and/or get a pilot spacer/adapter(if you don't buy a custom LS1/Th350 torque converter).
You going carbureted or sticking with EFI?
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Old 04-24-2010, 03:15 PM   #3
glock35ipsc
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Re: ls1 motor mount adapter plates

Actually, the top link is the thinner ones (5/16"), Use those. Go back through my build thread. There is a post in there with all the parts, numbers, prices, and places to buy of the parts that I used.
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Old 04-24-2010, 03:46 PM   #4
bigarmzz
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Re: ls1 motor mount adapter plates

well i currently have a 700r4, so i shouldnt have any problems with needing to go an inch further or back....


Quote:
Originally Posted by team39763 View Post
Those mounts will work fine if you're planning to run the 700r4 or 4l60e trans. I ran the th350 with those style of mounts and it moved the motor too far from the trans. I ended up bying the S&P 1" setback adapters for mine. The S&P's made the motor sit up higher and gave me a little more exhaust clearance around the frame and control arm.
Start reading up on how you want to do you accessories if you don't already have them, I think which type you use affects if you can fit A/C equipment easily or not. Alternator wiring needs attention - you may have to run a resistor in the wire going to the plug. If you're gonna use a Th350/400, you may have to change the flexplate and/or get a pilot spacer/adapter(if you don't buy a custom LS1/Th350 torque converter).
You going carbureted or sticking with EFI?
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Old 04-24-2010, 03:47 PM   #5
bigarmzz
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Re: ls1 motor mount adapter plates

Quote:
Originally Posted by glock35ipsc View Post
Actually, the top link is the thinner ones (5/16"), Use those. Go back through my build thread. There is a post in there with all the parts, numbers, prices, and places to buy of the parts that I used.
cool, so the thinner ones are the better ones.....i started going back through your thread last night.....man has it grown!...my eyes were getting tired trying to find the info i was looking for
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Old 04-24-2010, 11:04 PM   #6
STOCKISH
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Re: ls1 motor mount adapter plates

I used the thicker ones on my 6.0/4l80e swap. They worked perfect and the enging sits high enough that the truck pan doesnt hang below the frame but maybe 1/4 inch. I am sure either one will work. The ones I used also left the engine in the stock location and didnt move it forward or back. I was also able to use the factory driveshaft with the yoke from the 4l80 and a conversion joint.
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